posted by diane on .
need help with math 117 week 4 checkpoint
If you post one or two of the questions and your answers, we'll be glad to check them for you.
1. The cost, in millions of dollars, to remove x % of pollution in a lake modeled by C=6,000/200-2x
a. What is the cost to remove 75% of the pollutant?
Answer: $120 million dollars
b. What is the cost to remove 90% of the pollutant?
Answer: $300 millions dollars
c. What is the cost to remove 99% of the pollutant?
Answer: $3 million dollars
d. For what value is this equation undefined?
e. Do the answers to sections a. through d. match your expectations? Explain why or why not.